tda 7265
TRANSCRIPT
TDA7265
25 +25W STEREO AMPLIFIER WITH MUTE & ST-BY
WIDE SUPPLY VOLTAGE RANGE (UP TO±25V ABS MAX.)SPLIT SUPPLYHIGH OUTPUT POWER25 + 25W @ THD =10%, RL = 8Ω, VS = +20VNO POP AT TURN-ON/OFFMUTE (POP FREE)STAND-BY FEATURE (LOW Iq)SHORT CIRCUIT PROTECTIONTHERMAL OVERLOAD PROTECTION
DESCRIPTIONThe TDA7265 is class AB dual Audio power am-plifier assembled in the Multiwatt package, spe-cially designed for high quality sound applicationas Hi-Fi music centers and stereo TV sets.
April 2002
®
Multiwatt11ORDERING NUMBER: TDA7265
+5V
18K15K
IN (L)
1µF
15K 1µFMUTE/ST-BY
GND
IN (R)1µF
4.7Ω
4.7Ω
100nF
100nF
OUT (L)
OUT (R)
1000µF
1000µF
+VS
35
7
9
6
112
4+
+
-
-
D94AU085
RL (L)
RL (R)
-VS
µP560Ω
18K
IN- (L)8
10 IN- (R)
1
560Ω
18K
Figure 1: Typical Application Circuit in Split Supply
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ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
VS DC Supply Voltage ±25 V
IO Output Peak Current (internally limited) 4.5 A
Ptot Power Dissipation Tcase = 70°C 30 W
Top Operating Temperature -20 to 85 °CTstg, Tj Storage and Junction Temperature -40 to +150 °C
1
2
3
4
5
6
7
9
10
11
8
IN+(1)
IN-(1)
GND
IN-(2)
IN+(2)
-VS
MUTE
OUTPUT(2)
+VS
OUTPUT(1)
-VS
TAB CONNECTED TO PIN 6 D95AU316
PIN CONNECTION (Top view)
THERMAL DATA
Symbol Description Value Unit
Rth j-case Thermal Resistance Junction-case Max 2 °C/W
PLAY5V
R215K
IN (L)
C3 1µF
R110K
C11µF
MUTE
IN (R)C4 1µF
R84.7Ω
R71K
C70.1µF
OUT (L)
OUT (R)
C51000µF
+VS
35
7
9
6
112
4+
+
-
-
D96AU444A
OUT(L)
OUT(R)
GND
R430K
IN- (L)8
10
IN- (R)
1
R51K
R630K
R94.7Ω
C9 470µF
C10 470µF
C80.1µF
R315K
0MUTE
Q1BSX33
C60.1µF
D1 5.1V
C2100µF
Fig 2: Typical Application Circuit in Single Supply
TDA7265
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ELECTRICAL CHARACTERISTICS (Refer to the test circuit, VS = + 20V; RL = 8Ω; RS = 50Ω;GV = 30dB; f = 1KHz; Tamb = 25°C, unless otherwise specified.)
Symbol Parameter Test Condition Min. Typ. Max. Unit
VS Supply Range +5 +25 V
Iq Total Quiescent Current 80 130 mA
VOS Input Offset Voltage –20 +20 mV
Ib Non Inverting Input Bias Current 500 nA
PO Music Output Power (*) THD = 10%; RL = 8Ω ;VS = + 22.5V
32 W
PO Output Power THD = 10%RL = 8Ω ; VS + 16V; RL = 4Ω
20 2525
WW
THD = 1%RL = 8Ω ; VS + 16V; RL = 4Ω
2020
WW
THD Total Harmonic Distortion RL = 8Ω ; PO = 1W; f = 1KHz 0.01 %
RL = 8Ω ; PO = 0.1 to 15W;f = 100Hz to 15KHz
0.7 %
RL = 4Ω ; PO = 1W; f = 1KHz 0.02 %
RL = 4Ω ; VS + 16V;PO = 0.1 to 12W;f = 100Hz to 15KHz
1 %
CT Cross Talk f = 1KHzf = 10KHz
7060
dBdB
SR Slew Rate 10 V/µs
GOL Open Loop Voltage Gain 80 dB
eN Total Input Noise A Curve f = 20Hz to 22KHz
34 8
µVµV
Ri Input Resistance 15 20 KΩSVR Supply Voltage Rejection
(each channel)fr = 100Hz Vr = 0.5V 60 dB
Tj Thermal Shut-downJunction Temperature
145 °C
MUTE FUNCTION [ref: +VS]
VTMUTE Mute / Play Threshold -7 -6 -5 V
AM Mute Attenuation 60 70 dB
STAND-BY FUNCTION [ref: +VS]
VTST-BY Stand-by / Mute Threshold -3.5 -2.5 -1.5 V
AST-BY Stand-by Attenuation 110 dB
Iq ST-BY Quiescent Current @ Stand-by 3 mA
Note : (*) FULL POWER up to. VS = ±22.5V with RL = 8Ω and VS = ±16V with RL = 4Ω MUSIC POWER is the maximal power which the amplifier is capable of producing across the rated load resistance (regardless of non linearity) 1 sec after the application of a sinusoidal input signal of frequency 1KHz.
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Figure 3: Quiescent Current vs. Supply Voltage Figure 4: Frequency Response
Figure 5: Output Power vs. Supply Voltage Figure 6: T.H.D. vs. Output Power
Figure 7: Output Power vs. Supply Voltage Figure 8: T.H.D. vs. Output Power
TDA7265
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Figure 9: Quiescent Current vs. Pin # 5 Voltage Figure 10: Attenuation vs. Pin # 5 Voltage
Figure 11: SVR vs. Frequency Figure 12: Crosstalk vs. Frequency
Figure 13: Power Dissipaton vs. Output Power Figure 14: Power Dissipaton vs. Output Power
TDA7265
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MUTE STAND-BY FUNCTIONThe pin 5 (MUTE/STAND-BY) controls the ampli-fier status by two different thresholds, referred to+VS.
- When Vpin5 higher than = +VS - 2.5V theamplifier is in Stand-by mode and the finalstage generators are off
- when Vpin5 is between +VS - 2.5V and +VS- 6V the final stage current generators areswitched on and the amplifier is in mutemode
- when Vpin5 is lower than +VS - 6V the am-plifier is play mode.
t
OFF
STDBY
MUTE MUTE MUTE MUTE
PLAY STDBY PLAY OFF
STDBY
20
+VS
(V)
-20
-VS
VIN
(mV)
Vpin5(V)
VS
VS-2.5VS-6
VS-10
Iq(mA)
0
VOUT(V)
D94AU086
Figure 15
TDA7265
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R3
IN (L)
C1
R2 C3MUTE/ST-BY
GND
IN (R)C2
R7
R10
C8
C9
OUT (L)
OUT (R)
C6
C4
+VS
35
7
9
6
112
4+
+
-
-
D94AU087B
RL (L)
RL (R)
+VS
-VS
R9
R5
IN- (L)8
10 IN- (R)
1
SW1
R1
DZ
R4
SW2
C7
R8
R6
C5
Q1
ST-BY
MUTE
Figure 16: Test and Application Circuit (Stereo Configuration)
Figure 17: PC Board and Components Layout of the figure 15 (1:1 scale)
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COMPONENTS RECOMMENDEDVALUE PURPOSE LARGER THAN
RECOMMENDED VALUESMALLER THAN
RECOMMENDED VALUE
R1 10KΩ Mute Circuit Increase of DzBiasing Current
R2 15KΩ Mute Circuit Vpin # 5 Shifted Downward Vpin # 5 Shifted Upward
R3 18KΩ Mute Circuit Vpin # 5 Shifted Upward Vpin # 5 Shifted Downward
R4 15KΩ Mute Circuit Vpin # 5 Shifted Upward Vpin # 5 Shifted Downward
R5, R8 18KΩ Closed Loop GainSetting (*)
Increase of Gain
R6, R9 560Ω Decrease of Gain
R7, R10 4.7Ω Frequency Stability Danger of Oscillations Danger of Oscillations
C1, C2 1µF Input DCDecoupling
Higher Low FrequencyCutoff
C3 1µF St-By/Mute TimeConstant Larger On/Off Time Smaller On/Off Time
C4, C6 1000µF Supply VoltageBypass Danger of Oscillations
C5, C7 0.1µF Supply VoltageBypass Danger of Oscillations
C8, C9 0.1µF Frequency Stability
Dz 5.1V Mute Circuit
Q1 BC107 Mute Circuit
(*) Closed loop gain has to be => 25dB
APPLICATIONS SUGGESTION(Demo Board Schematic)The recommended values of the external compo-
nents are those shown are the demo board sche-matic different values can be used: the followingtable can help the designer.
MUTE, STAND-BY TRUTH TABLE
SW1 SW2
B A STAND-BY
B B STAND-BY
A A MUTE
A B PLAY
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BRIDGE APPLICATIONAnother application suggestion concerns theBRIDGE configuration, where the two power am-plifiers are connected as shown by the schematicdiagram of figure. 18.This application shows, however, some operativelimits due to dissipation and current capability ofthe output stage. For this reason, we reccomendto use the TDA7265 in bridge with the supply volt-age equal/lower than ±16V when the load is 8Ω;with higher loads (i.e.16Ω), the amplifier can workcorrectly in the whole supply voltage range.
The detected characteristics of T.H.D. vs Poutand Frequency Response are shown in fig.19 andfig.20.With R1=8Ω, Vs=+/-16V the maximum outputpower obtainable is 50W at T.D.H.=10%.The quiescent current remains unchanged withrespect to the stereo configuration (~80mA astypical at Vs=+/-16V).The last point to take into consideration concernsthe short-circuit protection. As for the stereo appli-cation, the TDA7265 is fully protected against anykind of short-circuit ( between Out/Gnd, Out/+Vsand Out/-Vs).
Figure 19: Distortion vs. Output Power Figure 20: Frequency Response of the Bridge Ap-plications
1µF
ST-BY/MUTE
1µF
R5 4.7Ω
R64.7Ω
C70.1µF
C90.1µF
C50.1µF
C41000µF
+VS
35
7
9
6
112
4+
+
-
-
D94AU190
RLR2
560Ω
R136KΩ
8
10
1
R4560Ω
R336KΩ
C1
IN
C2
C30.1µF
C61000µF
-VS
C85.6nF
Figure 18: Bridge Application Circuit
TDA7265
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Multiwatt11 V
DIM.mm inch
MIN. TYP. MAX. MIN. TYP. MAX.
A 5 0.197
B 2.65 0.104
C 1.6 0.063
D 1 0.039
E 0.49 0.55 0.019 0.022
F 0.88 0.95 0.035 0.037
G 1.45 1.7 1.95 0.057 0.067 0.077
G1 16.75 17 17.25 0.659 0.669 0.679
H1 19.6 0.772
H2 20.2 0.795
L 21.9 22.2 22.5 0.862 0.874 0.886
L1 21.7 22.1 22.5 0.854 0.87 0.886
L2 17.4 18.1 0.685 0.713
L3 17.25 17.5 17.75 0.679 0.689 0.699
L4 10.3 10.7 10.9 0.406 0.421 0.429
L7 2.65 2.9 0.104 0.114
M 4.25 4.55 4.85 0.167 0.179 0.191
M1 4.73 5.08 5.43 0.186 0.200 0.214
S 1.9 2.6 0.075 0.102
S1 1.9 2.6 0.075 0.102
Dia1 3.65 3.85 0.144 0.152
OUTLINE ANDMECHANICAL DATA
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TDA7265
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